$OpenBSD$
Look for guile-snarf as guile-snarf2.2
(lang/guile2 installs it that way)
Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -230,7 +230,7 @@ AS_IF([test "x$enable_guile" != "xno"],[
     GUILE_FLAGS
     AC_DEFINE_UNQUOTED([GUILE_BINARY],"$GUILE",[guile binary])
     AC_DEFINE(BUILD_GUILE,[1], [Do we support Guile?])
-    AC_SUBST(GUILE_SNARF, [guile-snarf])
+    AC_SUBST(GUILE_SNARF, [guile-snarf2.2])
     guile_version=$($PKG_CONFIG guile-2.2 --modversion)
   ])
 ])